Fix theme switcher preload scrim race

shell/plugins/background/Background.qml

@@ -110,7 +110,7 @@ Item {
 
   Process {
     id: themeSwitchProc
-    command: ["bash", "-lc", "theme=$(omarchy-theme-switcher); [[ -n $theme ]] && omarchy-theme-set \"$theme\""]
+    command: ["bash", "-lc", "theme=$(omarchy-theme-switcher); [[ -n $theme ]] && omarchy-theme-set \"$theme\" >/dev/null 2>&1 &"]
     onExited: root.refreshBackground()
   }
 

shell/plugins/image-picker/ImagePicker.qml

@@ -324,6 +324,12 @@ Item {
   }
 
   function preloadRows(nextImageRows, nextSelectedImage, nextShowLabels, nextFilterable) {
+    // Theme/background set hooks can warm selector rows after a picker was
+    // dismissed. Ignore those preloads while a user-visible request is open;
+    // otherwise the preload resets layoutSettled without revealing again,
+    // leaving only the fullscreen scrim.
+    if (opened || requestActive) return
+
     requestSerial += 1
     imageRows = nextImageRows
     selectedImage = nextSelectedImage

test/shell.d/background-test.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+source "$(dirname "$0")/base-test.sh"
+
+run_node_test <<'JS'
+const fs = require('fs')
+
+const backgroundQml = fs.readFileSync(path.join(root, 'shell/plugins/background/Background.qml'), 'utf8')
+
+assert(
+  /theme=\$\(omarchy-theme-switcher\); \[\[ -n \$theme \]\] && omarchy-theme-set \\"\$theme\\" >\/dev\/null 2>&1 &/.test(backgroundQml),
+  'background theme switcher starts theme application asynchronously after selection'
+)
+JS

test/shell.d/image-picker-test.sh

@@ -5,6 +5,7 @@ set -euo pipefail
 source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
 
 run_node_test <<'JS'
+const fs = require('fs')
 const picker = requireFromRoot('shell/plugins/image-picker/ImagePickerModel.js')
 
 assertEqual(picker.nameForPath('/themes/nord-river.png'), 'nord-river', 'image picker strips directory and extension')
@@ -40,4 +41,10 @@ assertEqual(picker.indexForSelectedImage(images, '/missing.png'), 0, 'image pick
 assertEqual(picker.filteredPosition(images, 2, 'dark'), 1, 'image picker computes filtered position')
 assertEqual(picker.selectedFilteredPosition(images, 2, 'dark'), 0, 'image picker selected filtered position falls back when selected is hidden')
 assertEqual(picker.nextSelectedIndexForFilter(images, 0, 'dark'), 1, 'image picker moves selection to first match when filter hides current item')
+
+const imagePickerQml = fs.readFileSync(path.join(root, 'shell/plugins/image-picker/ImagePicker.qml'), 'utf8')
+assert(
+  /function preloadRows[\s\S]*if \(opened \|\| requestActive\) return/.test(imagePickerQml),
+  'image picker ignores cache preloads while a request is visible'
+)
 JS